4690k voltage question

[MPDota]

So i overclocked my 4690k from 3.5 to 4.0 GHz, without touching the voltages. I stressed CPU for around 30 mins in CPU-z and monitored temps with coretemp, highest was 57C. So am i just lucky or did i do something wrong, do i need to up CPU voltage a bit? Also wanna mention that CPU-z stress score is not that stable, it drops to 3k sometimes, then jumps to 6 and 7k? Does it say someting?

 

[Hawkshot]

So i overclocked my 4690k from 3.5 to 4.0 GHz, without touching the voltages. I stressed CPU for around 30 mins in CPU-z and monitored temps with coretemp, highest was 57C. So am i just lucky or did i do something wrong, do i need to up CPU voltage a bit? Also wanna mention that CPU-z stress score is not that stable, it drops to 3k sometimes, then jumps to 6 and 7k? Does it say someting?

when I started looking at overclocking this article was pretty helpful for me and maybe some use of you.

http://www.gamespot.com/articles/overclocking-for-beginners/1100-6421190/

 

[synphul]

You probably won't notice much change, 4ghz is barely an overclock. Keep in mind the 4690k like other i5's and i7's have a stock base speed and a turbo boost speed. For the 4690k it's 3.5ghz base with the ability to turbo boost to 3.9ghz. The way turbo boost works if there's a high demand and one core is heavily loaded and it has the thermal headroom it will boost that core to 3.9. If two cores are heavily loaded it will boost them to 3.8 and if all 4 are loaded it will likely end up around 3.7ghz.

So yes 4ghz is an overclock but a very mild one that probably won't cause much additional heat or require much if any additional core voltage. I'm not very familiar with the cpu-z stress test, for thermal testing you may want to try prime95 version 26.6 and select the small fft's test for a steady load. A fluctuating load spiking and dropping isn't very reliable for thermal testing. For actual stability testing I use intel burn test and asus realbench. Realbench is a variety of tests that goes through the cpu, ram, gpu etc and stresses the whole system.

You shouldn't have to start messing with the voltage too much until you reach around 4.2, 4.3ghz and up. Don't up the core voltage unless you're having stability issues (crashing, bsod under stress tests). The goal is to up the multiplier and frequency of the cpu with the least amount of vcore. Vcore directly results in higher temps so if it's not crashing, upping vcore would only give you higher temps without any other benefit.

 

[DonkeyOatie]

I have (had) an i5 4690K and was able to get it to 4.2 Ghz at stock voltages and temperatures. I was ultimately able to get to 4.8Ghz, at reasonable temperatures, but higher voltage than I like, so I ran it at 4.6Ghz and 1.283V.

It is both safe and normal for stress temperatures to reach 80C, and normal operating temperature, under extreme gaming, to reach or slightly exceed 60C.

Since the Turbo on that chip is 3.9 Ghz, 4.0Ghz should be achievable by every unlocked chip.

I tend to work the other way around. I set/select a sensible voltage and temperature, and see what multiplier it will support, then go one more step and see if I can live with that. I find it to be much quicker getting there that way.

 

[MPDota]

I disabled turbo boost and those power saving options in bios, did i do right?

 

[DonkeyOatie]

That's where you start with an overclock. I would suggest setting the Voltage to 1.25V and see how high a multiplier you can get stable. Temperatures should be completely sensible at that voltage.

What is your motherboard?

 

[MPDota]

It's Gigabyte z97x gaming 3?

 

[DonkeyOatie]

That's an OK motherboard, so you should be able to get a decent overlock.